Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: No Reino Unido, qual empresa possui uma data desconhecida e é um negócio de energia?
 ###Tabelas: CREATE TABLE full_results (full_results_id AUTO_INCREMENT PRIMARY KEY, Finished VARCHAR, Post INT, Horse VARCHAR, Jockey VARCHAR, Trainer VARCHAR, Odds INT) CREATE TABLE non-parliamentary_parties (non-parliamentary_parties_id AUTO_INCREMENT PRIMARY KEY, English party name VARCHAR, Norwegian party name VARCHAR, Associated ideology VARCHAR, Current leader VARCHAR, International affiliation VARCHAR, 2013 Parliamentary election VARCHAR, County councils ( 2011 ) INT) CREATE TABLE north_carolina_counties_ranked_by_per_capita_income (north_carolina_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE list_of_subsidiaries (list_of_subsidiaries_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Company VARCHAR, Business VARCHAR, Country VARCHAR, Value ( USD ) VARCHAR) CREATE TABLE georgia (georgia_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Incumbent VARCHAR, Party VARCHAR, First elected INT, Status VARCHAR, Opponent VARCHAR)  
SELECT Company FROM list_of_subsidiaries WHERE Business = energy AND Date = unknown AND Country = united kingdom